Themeforrest API & WordPress Update Collision

Hi together.
I got an error, when i use this: “https://……/wp-content/themes/enfold/framework/images/layout/FIND_API.jpg”

As you provide i generate a API-Key to update the enfold-theme automatically. When i do this i got an error since the last enfold-update to version 3.2.2
In that case i activate my API-Key and i want to update plugins or something over the “https://……../wp-admin/update-core.php” URL WordPress can´t open the page. It take a long time with a white page and after ca. 10 Min the error message appear:

This page contains the following errors:
error on line 1 at column 1: Document is empty
Below is a rendering of the page up to the first error.

When i delete my themeforest-username and the API-Key from the section it work without any error. Can you please deploy a solution? THX :-)

Greetz from Germany, Lars